Velocity+Struts生成html

package vm2html.struts.action; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.PrintWriter; import java.util.Properties; import javax.servlet.ServletConfig; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.velocity.Template; import org.apache.velocity.VelocityContext; import org.apache.velocity.app.Velocity; import org.apache.velocity.exception.ParseErrorException; import org.apache.velocity.exception.ResourceNotFoundException; /** * @author root * */ public abstract class BaseAction extends Action { public String outPath = ""; public static final String REQUEST = "req"; public static final String RESPONSE = "res"; public static final String CONTENT_TYPE = "default.contentType"; public static final String DEFAULT_CONTENT_TYPE = "text/html"; public static final String FILE_RESULT_OUT_PATH = "file.result.out.path"; public static final String DEFAULT_OUTPUT_ENCODING = "UTF-8"; protected static final String INIT_PROPS_KEY = "org.apache.velocity.properties"; public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { ServletConfig config = this.servlet.getServletConfig(); Velocity.init(loadConfiguration(config)); VelocityContext context = new VelocityContext(); setDefaultContext(context, request, response); return this.doForward(mapping, form, request, response, context); } protected abstract ActionForward doForward(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response, VelocityContext context) throws Exception; /** * @注释 生成Html文件 * @param context * @param templateFile * @param outPutFile * @return * @throws Exception * @throws ParseErrorException * @throws ResourceNotFoundException */ public Template doTemplateToFile(VelocityContext context, String templateFile, String outPutFile) throws ResourceNotFoundException, ParseErrorException, Exception { Template template = Velocity.getTemplate(templateFile); String outFilePath = outPath + outPutFile; this.makeDir(outFilePath); PrintWriter dw = new PrintWriter(outFilePath); template.merge(context, dw); dw.close(); return template; } /** * @注释 创建文件夹 * @param dir */ public void makeDir(String dir) { java.io.File myFilePath = new java.io.File(dir); if(!myFilePath.getPath().endsWith("\\")){ int index = myFilePath.getPath().lastIndexOf("\\"); myFilePath = new java.io.File(myFilePath.getPath().substring(0, index)); } if (!myFilePath.exists()) myFilePath.mkdirs(); } /** * @注释：设置默认context值 * @param context * @param request * @param response * @return */ private VelocityContext setDefaultContext(VelocityContext context, HttpServletRequest request, HttpServletResponse response) { context.put("request", request); context.put("response", response); context.put("req", request); context.put("res", response); return context; } /** * @注释：解析velocity.Properties * @param config * @return Properties * @throws IOException * @throws FileNotFoundException */ protected Properties loadConfiguration(ServletConfig config) throws IOException, FileNotFoundException { String propsFileName = config.getInitParameter(INIT_PROPS_KEY); if (propsFileName == null) { propsFileName = "/WEB-INF/velocity.properties"; } Properties props = new Properties(); if (propsFileName != null) { String realPath = config.getServletContext().getRealPath( propsFileName); if (realPath != null) { propsFileName = realPath; } props.load(new FileInputStream(propsFileName)); // 加载属性配置文件 } // 将日志文件所在路径加入到Velocity上下文中 String logFileName = props.getProperty(Velocity.RUNTIME_LOG); if (logFileName != null) { String log = config.getServletContext().getRealPath(logFileName); if (log != null) { props.setProperty(Velocity.RUNTIME_LOG, log); } } // 不使用VM_global_library模板，加入存在则删除Velocity上下文(Context)中 String libraryName = props.getProperty(Velocity.VM_LIBRARY); if (libraryName != null) { props.setProperty(Velocity.VM_LIBRARY, ""); } // 生成文件输出路径 outPath = props.getProperty(FILE_RESULT_OUT_PATH); outPath = config.getServletContext().getRealPath( outPath = outPath == null ? "/" : outPath); outPath = outPath.endsWith("/") ? outPath : outPath + "/"; if (libraryName != null) { props.setProperty(Velocity.VM_LIBRARY, ""); } // 将Velocity模板加入到Velocity上下文(Context)中 String path = props.getProperty(Velocity.FILE_RESOURCE_LOADER_PATH); if (path != null) { String realPath = config.getServletContext().getRealPath(path); if (realPath != null) { props.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, realPath); } } else { String realPath = config.getServletContext().getRealPath("/"); if (realPath != null) { props.setProperty(Velocity.FILE_RESOURCE_LOADER_PATH, realPath); } } // System.out.println("props = " + props); return props; } }